Function tryExtensions

lib/internal/modules/cjs/loader.js:607–616

* Given a path, check if the file exists with any of the set extensions. * @param {string} basePath The path and filename without extension * @param {string[]} exts The extensions to try * @param {boolean} isMain Whether the module is the main module * @returns {string|false}

(basePath, exts, isMain)

 * @returns {string|false}
 */
function tryExtensions(basePath, exts, isMain) {
  for (let i = 0; i < exts.length; i++) {
    const filename = tryFile(basePath + exts[i], isMain);

    if (filename) {
      return filename;
    }
  }
  return false;
}

/**
 * Find the longest (possibly multi-dot) extension registered in `Module._extensions`.